(Tuolumne) "Big Oak Flat, Sept 23 Cal", manuscript postmark (TOU-XXXX, R5) and matching manuscript "5" due rating on buff cover to Doctor Pownall, Columbia Diggings, Sonora Cal.; flap faulty and some edge wear, F.-V.F., This is the only recorded example by Williams.. Estimate  $400 - 600. $0 (Image)